Mari and jen each work 20 hours a week at different jobs. mari earns twice as much as jen. together they earn $480.how much does each girl earn in a week

What kinds of numbers make up the set of numbers called the real numbers? give examples when you explain a number type. there are a limited set of types of numbers, but an unlimited number of examples of these numbers.

Suppose a store sells an average of 80 cases of soda per day. assume that each case contains 24 cans of soda and that the store is open 10 hours per day. find the average number of soda that the store sells per hour.

Let x = a + bi and y = c + di and z = f + gi. which statements are true?